Mazda RX-8 Workshop Manual page 2527

Is there continuity between A/C amplifier
connector (16-pin) terminal 2P (+5 V
signal) and body ground?
8* CHECK TO SEE WHETHER MALFUNCTION (LACK OF
CONTINUITY) IS IN A/C AMPLIFIER OR WIRING
HARNESS (BETWEEN A/C AMPLIFIER AND AIR MIX
ACTUATOR)
Disconnect A/C amplifier connector (16-
pin) and air mix actuator connector.
Is there continuity between A/C amplifier
connector (16-pin) terminal 2N
(potentiometer GND signal) and air mix
actuator connector terminal A?
9* CHECK TO SEE WHETHER MALFUNCTION (SHORT
TO B+) IS IN A/C AMPLIFIER OR WIRING
HARNESS (BETWEEN A/C AMPLIFIER AND AIR MIX
ACTUATOR)
Turn the ignition switch to ON position.
Test voltage at A/C amplifier connector
(16-pin) and terminal 2N (potentiometer
GND signal).
Is voltage approx. 12 V?
10* CHECK TO SEE WHETHER MALFUNCTION (LACK OF
CONTINUITY) IS IN WIRING HARNESS (BETWEEN
A/C AMPLIFIER AND AIR MIX ACTUATOR) OR
ELSEWHERE
Turn the ignition switch to ON position.
Test voltage at air mix actuator connector
terminal C (+5 V signal).
Is voltage approx. 5 V?
11* CHECK TO SEE WHETHER MALFUNCTION (LACK OF
CONTINUITY) IS IN WIRING HARNESS (BETWEEN
A/C AMPLIFIER AND AIR MIX ACTUATOR) OR
ELSEWHERE
Turn the ignition switch to LOCK position.
Disconnect A/C amplifier connector (16-
pin) and air mix actuator connector.
Is there continuity between A/C amplifier
connector (16-pin) terminal 2D
YesGo to next step.
No Repair wiring harness between A/C
amplifier and air mix actuator, then go
to Step 19.
YesRepair wiring harness between A/C
amplifier and air mix actuator, then go
to Step 19.
No Replace A/C amplifier, then go to Step
19.
YesGo to next step.
No Repair wiring harness between A/C
amplifier and air mix actuator, then go
to Step 19.
YesGo to next step.
No Repair wiring harness between A/C
amplifier and air mix actuator, then go
to Step 19.